"ELEC RQMTS:118 VAC,50/60 HZ,SGL PHASE,10 AMP MAX;SCREEN DIA 20 IN.;SCREEN CTR LINE TO FLOOR 36.500 IN.;O/A DIM. 41 IN. LG,26.500 IN. W,65 IN. H;TRANSVERSE MEASURING TRAVEL 4 IN.;HORIZONTAL MEASURING TRAVEL 6 IN. W/3 IN. DIA MICROMETER W/1 IN. TRAVEL GRADUATED IN. 0.0001 IN. HELIX ANGLE,LEFT AND RIGHT 10 DEG,FOCAL TRAVEL 1 IN.,ANGLE MEASURING 360 DEG,PROJECTION SYSTEM 250 W,REFLECTION SYSTEM 500 W,LENSES 10X,20X,31.25X,50X,62.5X AND 100X"